Adjustable pressure regulator for irrigation systems



FIG. 1 is an isometric view of an adjustable pressure regulator for irrigation systems;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken lines showing unclaimed portions of the adjustable pressure regulator form no part of the claimed design. 

The ornamental design for an adjustable pressure regulator for irrigation systems, as illustrated shown and described. 